that's dzhokhar tsarnaev, we believe. he's believed to be 19 years of age. his family comes from the chechnya area, which you mentioned. his older brother, tamerlan, was killed in a police shoot-out last night around watertown, massachusetts. so the first order of business is to try to find that guy because they're worried that he's heavily armed, he may have other explosives with him, he's already demonstrated a willingness and an ability to kill, and they're concerned about what he could do next. the other order of business, though, beyond the tactical police search in the pressing manhunt is trying to find out are these two brothers connected to anything bigger. are they connected to any kind of domestic or foreign cell. it's kind of a strange case because you've got two brothers who have family connections back to chechnya, a region that's been troubled for a long time with various radicals, but we've found out now they've lived here quite a long time. these two brothers, according to family members, have been here for a number of years. in fact, we thin